Charlotte Pipe 3/4 in. x 1/2 in. PVC Schedule 40 Degree S x S Reducer Coupling PVC 02100 3400HD - The Home Depot
Charlotte Pipe 2 in. PVC Schedule 40 S x S Coupling PVC021001600HD - The Home Depot
NIBCO 2 in. PVC DWV Hub x Hub Coupling Fitting C4801HD2 - The Home Depot
Homewerks Worldwide 2 in. PVC Compression Coupling 511-43-2-2H - The Home Depot
Halex 1/2 in. Rigid Conduit Coupling 64005 - The Home Depot
Fernco 2-in. Shielded Specialty Coupling for Sewer, Drain, Waste and Vent Piping - Rustproof Stainless Steel Clamps - IAPMO Safety Listed in the PVC Pipe & Fittings department at Lowes.com
NIBCO 2 in. ABS DWV Hub x Hub Coupling C5801HD2 - The Home Depot
1" X 1/2" Stainless Steel Threaded Reducing Coupling
Canplas 193022 PVC DWV Reducing Coupling, 2 x 1-1/2-Inch, White - Pipe Fittings - Amazon.com
Charlotte Pipe 2-in PVC DWV Repair Coupling Fitting - Schedule 40, NSF Safety Listed - Join and Extend Pipes in the PVC DWV Pipe & Fittings department at Lowes.com
Fernco 2-in. Flexible PVC Coupling for Sewer, Drain, Waste and Vent Piping - IAPMO Classified, CSA Approved in the PVC Pipe & Fittings department at Lowes.com